Southern -- again I'm bad at identifying/naming genres... all but the last one are from the Django soundtrack... (here's a website about the Django Unchained Soundtrack, Tarantino talking about my favorite "Unchained" starts at 48:00)

!Unchained (The Payback / Untouchable) (James Brown/2Pac) I had such high hopes for this... if the track was just the Payback remix that kicks in at 0:53 of the movie trailer, it would be perfect. With movie clips and a mashup with Tupac, it's just pretty good.

Freedom (Anthony Hamilton) Had to see the movie for me to notice this. Sounds a bit like Gnarls Barkley's "Crazy"

Man of Constant Sorrow (Kraak & Smaak) This is like the 4th or 5th version of this song I have, and it lacks the background chorus, but it sets a mood nicely.

Hiphop

Underwater Rimes (Remix) (Digital Underground) Haha, early 90s hiphop comedy against the awesome Chameleon bassline. Calling it "Rimes" is hella clever, but made it tougher to search for on e-stores.

!!!Bane - Freestyle Rap (Auralnauts) Terrifically terrible freestyle. I find the youtube rip better than the version I paid for.